The Siemens SIRIUS 3RH1131-1AP00-0TK0 is a size S00 auxiliary contactor with three normally-open instantaneous contacts and a 24 VDC coil rated at 10 A. It mounts via screw or snap-on to a DIN rail, fitting a 45 mm wide slot in the panel — standard for SIRIUS contactor assemblies where you need extra auxiliary poles without a separate relay bank.
Screw and snap-on mounting lets you clip it onto a 35 mm DIN rail or bolt it to a backplate. The 45 mm width matches the S00 contactor footprint, so it stacks alongside the main contactor without eating extra rail space. IP20 on the front means it's protected against finger contact inside the enclosure — standard for control panels, no washdown rating here.
Three instantaneous NO contacts handle switching at 24 VDC up to 10 A, with lower ratings at higher voltages — 1 A at 110 V, 0.27 A at 220 V. The contacts are rated for 30 million mechanical operations typical, with a contact reliability of one incorrect switching per 100 million operations at 17 V, 1 mA. Surge voltage resistance is 6 kV, pollution degree 3, so it's suited for industrial environments with moderate conductive contamination.
Wire termination accepts solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm². Operating temperature range is -25 to +60 °C; storage and transport from -55 to +80 °C. Shock resistance is 10g at 5 ms and 5g at 10 ms. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward.